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Add some debugging code (under ARGE_DEBUG) that counts each interrupt source.

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This should make it easier to track down interrupt storms from arge.

Tested:

* AP135 (QCA955x) SoC - defaults to ARGE_DEBUG enabled
* Carambola2 (AR9331 SoC) - defaults to ARGE_DEBUG disabled
This commit is contained in:
Adrian Chadd 2015-10-28 05:11:06 +00:00
parent bae28eaa8d
commit 3ea1870967
2 changed files with 37 additions and 0 deletions
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34
sys/mips/atheros/if_arge.c
View File

@ -277,6 +277,28 @@ arge_probe(device_t dev)
return (BUS_PROBE_NOWILDCARD);
}
#ifdef ARGE_DEBUG
static void
arge_attach_intr_sysctl(device_t dev, struct sysctl_oid_list *parent)
{
struct arge_softc *sc = device_get_softc(dev);
struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
struct sysctl_oid *tree = device_get_sysctl_tree(dev);
struct sysctl_oid_list *child = SYSCTL_CHILDREN(tree);
char sn[8];
int i;
tree = SYSCTL_ADD_NODE(ctx, parent, OID_AUTO, "intr",
CTLFLAG_RD, NULL, "Interrupt statistics");
child = SYSCTL_CHILDREN(tree);
for (i = 0; i < 32; i++) {
snprintf(sn, sizeof(sn), "%d", i);
SYSCTL_ADD_UINT(ctx, child, OID_AUTO, sn, CTLFLAG_RD,
&sc->intr_stats.count[i], 0, "");
}
}
#endif
static void
arge_attach_sysctl(device_t dev)
{
@ -288,6 +310,7 @@ arge_attach_sysctl(device_t dev)
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"debug", CTLFLAG_RW, &sc->arge_debug, 0,
"arge interface debugging flags");
arge_attach_intr_sysctl(dev, SYSCTL_CHILDREN(tree));
#endif
SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
@ -2440,6 +2463,9 @@ arge_intr(void *arg)
struct arge_softc *sc = arg;
uint32_t status;
struct ifnet *ifp = sc->arge_ifp;
#ifdef ARGE_DEBUG
int i;
#endif
status = ARGE_READ(sc, AR71XX_DMA_INTR_STATUS);
status |= sc->arge_intr_status;
@ -2456,6 +2482,14 @@ arge_intr(void *arg)
return;
}
#ifdef ARGE_DEBUG
for (i = 0; i < 32; i++) {
if (status & (1 << i)) {
sc->intr_stats.count[1 << i]++;
}
}
#endif
if (status & DMA_INTR_RX_BUS_ERROR) {
ARGE_WRITE(sc, AR71XX_DMA_RX_STATUS, DMA_RX_STATUS_BUS_ERROR);
device_printf(sc->arge_dev, "RX bus error");

3
sys/mips/atheros/if_argevar.h
View File

@ -214,6 +214,9 @@ struct arge_softc {
uint32_t intr_stray2;
uint32_t intr_ok;
} stats;
struct {
uint32_t count[32];
} intr_stats;
};
#endif /* __IF_ARGEVAR_H__ */